feeding winter veg

hi I have winter veg growing in a raised planter and pots sprouts and cabbage the soil is a peat free soil how often does it need to be fed in the winter ? I have put bone meal in the soil and also growmore granules about 6 weeks ago do I need to keep feeding through out the winter and if so how often
thanks sue

 

Hi Sue,

Can't say i've fed overwintering veg, but I mainly have it straight in the ground.